Squash frob checked_headers

db/migrations/1533844125_create_frob.down.sql

@@ -0,0 +1,4 @@
+DROP TABLE maker.frob;
+
+ALTER TABLE public.checked_headers
+  DROP COLUMN frob_checked;

db/migrations/1533844125_create_frob.up.sql

@@ -12,4 +12,7 @@ CREATE TABLE maker.frob (
   tx_idx    INTEGER NOT NUll,
   raw_log   JSONB,
   UNIQUE (header_id, tx_idx, log_idx)
-);
+);
+
+ALTER TABLE public.checked_headers
+  ADD COLUMN frob_checked BOOLEAN NOT NULL DEFAULT FALSE;

db/migrations/1533844125_create_frob_table.down.sql

@@ -1 +0,0 @@
-DROP TABLE maker.frob;

db/migrations/1538075501_add_frob_to_checked_headers.down.sql

@@ -1,2 +0,0 @@
-ALTER TABLE public.checked_headers
-    DROP COLUMN frob_checked;

db/migrations/1538075501_add_frob_to_checked_headers.up.sql

@@ -1,2 +0,0 @@
-ALTER TABLE public.checked_headers
-    ADD COLUMN frob_checked BOOLEAN NOT NULL DEFAULT FALSE;